Ventilator



(No Model.)

W. T. GOTTIEB.

VENTILATOR. No. 432,817. Patented July 22, 1890.

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UNITED STATES PATENT OFFICE.

\VILLIAM TALBOT COTTIER, OF OAKLAND, CALIFORNIA.

V E N T l LAT O R SPECIFICATION forming part of Letters Patent No.432,817, dated July 22, 1890.

Application filed May 2, 1889. Serial No. 309,831. (No model.)

To all whom it may concern:

Be it known that I, \VILLIAM TALBOT COT- TIER, a citizen of the UnitedStates, residing at Oakland, in the county of Alameda and State ofCalifornia, have invented certain new and useful Improvements inVentilators; and I do declare the following to be a full, clear, andexact description of theinvention, such as will enable others skilled inthe art to which it appertains to make and use the same.

This invention relates to a ventilator, and

is more particularly adapted for use in chimneys of dwellings,ventilation of sewers, cesspools, ships, and railroad-cars, although itmay be advantageously used in columns of structures and shafts of minesand other places.

The invention is illustrated in the accompanying drawing by a verticalcentral sectional view of a chimney.

In carrying out my invention I constructa chimney or shaft A of anysuitable material and form, and provide the same at different points inits height with apertures a for the reception of induction pipes ortubes, as will be presently explained. The shaft or chimney A is placedabove an aperture B, which is of a less size of diameter than thediameter of the said shaft.

0 indicates the induction-pipes, which are of a peculiarconstruction.These inductionpipesare of approximately trumpet form, hav ing a flaringor bell mouth entrance 6 adjacent to a contracted neck cl and theirinner or discharge ends gradually increased from the said neck to theterminal point. It will thus be seen that I present alarge mouth for thecollection of cold or outside air and also provide an expanding chamberwithin the shaft or chimney, so that the air enters the induction-pipefrom the outside. It is heated by the smoke, gases, and particles ofcombustion passing through the chimney in the course indicated by thearrows, and thus expanded so as to increase the efliciency of the draft.It is obvious that as these induct-ionpipes have their discharge endsarranged within the chimney, and in the course of the passage of heatedgases and particles of combustion there will be formed what will beproperly termed expanding chambers, so that the cold air enteringthrough the flaring mouths will be retarded by the neck or contractedportions and thence lightened by expansion in the enlarged portion, soas to accelerate the ascent. It will be observed that theinduction-pipes are so arranged in the shaft or chimney that the airleaving one of them will not form into an eddyand he directed downwardlyor pass through any of the other pipes. It will also be observed thatthese induction-pipes are kept some distance from the inner walls of thechimney, so that the upward draft will be central.

D indicates a deflector, which is arranged at a suitable point near thetop of the chimney, as shown, so that any smoke or air passing up thechimney will be deflected to the central portion, and from thencedischarged, as shown.

The number of induction-pipes to be used will depend upon the height orlength of the chimney, and in some chimneys it may be necessary to usebut two of them, in which case one will be placed on each side and atdifferent levels or heights. In someinstances only one of theseinduction-pipes can or may be used for want of room or proper exposure,or on ships, steamers, dvc.

The devices maybe made of sheet metal or any suitable material andapplied to chimneys or stacks such as at present in use, and should anyof them become impaired or inj ured they may be readily removed andreplaced by others.

Having described my invention, what I claim is 1. The combination, witha stack or chimney, of an induction-pipe having a flaring or bell mouthreceiver on the outside thereof and an upwardly-increasing discharge onthe inside, the latter being placed free from contact with the innerwall of the chimney and approximately in the vertical center of saidchimney, substantially as specified.

2. The combination, .with a stack 0r chimney, of a plurality ofinduction-pipes having a bell mouth receiver on the outside and anupwardly-increasing discharge on the inside and arranged approximatelyinthe vertical center of the stack and at diiferent heights or altitudes,substantially as specified.

3. The combination, with a stack or chimney having'a plurality ofinduction-pipes pro- In testimonywhereof I affix my signature invidedwith an upwardly-increasing discharge presence of two witnesses.portion arranged approximately Within the r r *1 7 center of the chimneyat different altitudes WILLIAM PALBOP (JOTFIER' and free from the wallsthereof, and deflect- Witnesses: ing-plates in the upper portion of saidstack, JOHN G. ROUTSON, substantially as specified. WM. BURGESS.

